A nice book for beginners. But do not expect to understand everything if you are not a chemist and/or a biologist who has done some prior reading on genetics.For the layman like me it will help understand the very basics of genetics, most importantly it helps (including genetic diseases) one understand how traits are carried forward and why certain diseases occur only in one gender.If one has not read anything about chromosomes and DNAs then do not read the book one fail to understand anything.